Machine for grinding valves



G. A. UL LIPS MACHINE-FOR GRINDING VALVES Filed May 5,

June 30, 1925.

ATTORNEYJ. v

Patented June 30, 1925.

UNITED, sTATEs PATENTIOFFICE-I.

GEORGE A. FULLIPS, or MILWAUKEE, WISCONSIN.

duce the particularzkindof motion best.

suited for the purpose. More particularly,

" it is the object of this invention to provide a mechanism suitable for grinding any valve upon its seat by -imparting to said valvea reciprocatory rotative motion and periodi cally raising it in opposition toa resilient pressure tending to seat "the valve so that the grinding compound which is being used will have an opportunity to flow again'on to the valve seat from which it has been pressed in the grinding operation.

Further objects of this invention are to provide adequate means for supporting the member with the valve, whereby the valves in'pipe-fittings or in internal combustion en gines may be handledequally well by this machine; to provide improved means for imparting the desired reciprocatory motion to the valve which is being ground; and to provide. a mechanism adapted to be associated wit-bothers of the same kind to be driven from a single. source ofpower for the purpose of performing a great number of valve grinding operations at the same time. i I v 4 e a In the drawings, g.

Figure 1 is a side elevation of a machine embodying thisinvention." I

Figure2is a sectional view in elevation showing the valve operating shaft, remaining portions ofqthe device being broken away.

'The frame ofvthe machine comprises .a support 1 mounted upon a base 2. The support may take the form of a box casting, as little metal being used therein "as is-possible, consistent with suitable strength. In the bearing shown at 3, is journaled the shaft- .4- which may be driven from'a suitable source of power. A. fly wheel 5 is preferably mounted thereon to make uniform the motion of the device. Adjacent to thefly MACHINE FOB, GRINDING VALVES.

Application filed ay 5, 1921. Serial No. 487,986..

wheel is the-sprocket. wheel6 provided for purposes hereinafter to be described;

The shaft 4' is provided witha crank 7 which operates the pitman 8 to impart to the rack 9 a vertical 'reciprocatory motion. The rack 9 is preferably. provided witha suitable sliding bearing upon the support 1. A pivotal connection 10 between the rack and the pitman 8 is provided foro'bvious reasons.

The rack 9 meshes with agear wheel 11 mounted at the endof shaft 12,.journale'd in the uppermost portion of supportl, and provided adjacent to its other end with be'veledgearwheel 13. l

Al bracket arm 15 supp'ortedfron'i the upper end of the box casting 1 provides mounting for the shaftsection 16 which is held in place by a collar 17. A beveled gear 18 carried by this short length of' shaft meshes with the beveled gear 13, upon' shaft 12. The hub of the be'veled ge'ar18 is recessed at 19 to receive the clutch member 20, keyed to the shaft section 21. "A brack ct 22 carriedby the frame of the machine provides suitable bearings forthis shaft.

The projections 23 and 24, located respecmember 20 in thefrecess 19 may be effected to impart to shaft21 themotionof shaft 16. At the lower end of shaft 21; is splined an additional shaft sectiO l 30 so mounted in bracket 31 as to have a, rotative andsliding bearing therein. I A collar32 upon this shaft serves as a seat for spring 33, the opposite. end of which bears against the bracket 22. By means. of this spring, thev shaft section 30 is resiliently pressed downwardly. In the lower end of the shaft section 30 a recess 35 is provided into which maybe inserted a chuck 36 suitable for. engage-- nient with the particular valveto be ground. Atransvcrse pin 37 may be inserted in a suitable opening to retainthe chuck 36 in position. 1

The lever 40 pivoted at 11 within the box casting or support member ,1.carries at its outer end afork 12 adapted to engage the collar 32 for the purpose of raising the'shaft section 30 against theresilient. pressure of- 7 is splined to shaft 21 so that the rotative movement of the latter shaft will be communicated to shaft 30 while permitting the Yerticalcsliding movement of shaft 30. At the rear of the machine frame 1 is journaled a transverse-shaft 43 which carries a cam 44: and the sprocket wheel 45, the

latter being connected by .a chain 46 with,

the sprocket wheel 6 upon 'the main drive shaft 4. The mechanism last described is so associated with the-clever that the rotation of shaft 4&3 and the ca-m i thereon will periodically actuate said lever to raise 1 shaft section 30 in the manner already described; I I

Asuitable table. 50 ,is supported by a fr.ame 51 having a sliding bearingupon the boxcasting 1. A rack 52 maybe cast integral with the casting 1 or may be mounted thereon. Suitable gear wheelsr53 mounted upon a shaft 54in the table supporting represented by the yalve casing shown at 58 which i to be gr u which includes the seat 59 for the valve 60 I It will be understood that the auxiliary table 57 will be adapted to the particular work to be done and may be omitted altogether where valves are to'lbe ground into their seats upon a heavy casting, such as the cylinder of an internal combustion engine. j

. When in use, my improved, valve grinding mechanism operates as follows.

'Power'being applied to the shaft -1, a-

reciprocatory mot on'will be imparted to the rack 9" through crank 7 and pitman 8. The rack 9 engaging with gear 11 will'cause the shaft section 1 6 to rotate first in one direction and then in the other. Assuming that the clutch member .QO'lS engaged in the recess 19, the l eciprocatory rot'ative motion ofshaft '16 will be communicatedthrough said clutch, to shaft-section's 21 and 30. It will be remembered-that the shaft section 30 while adapted to be rotated by shaft 21 is also'adaptedto have a slidingmotion relative to said shaft, but is normally pressed downwardly by the spring 33. Vith the valve casing 58 mounted in thei'position shown 1n the 'drawlng, the resilient downward pressure'of spring 33 upon collar 32 will be communicatedthrough shaft 30 and i the chuck'or tool 36 to the valve 60, thereby pressing said valve tightly against its seatwhile it is being rotated first in one direc- 7 z tion and then in the other by theiaction or rack 9 upon gear Wheel lland the mccha- 'nism above described. In the meantime,

however, the sprocket wheel 1-5 is being driven by chain 46 from the sprocket wheel I 6 upon the power shaft i and the cam 4a is being operatively rotated thereby. The rotation of cam 14' actuates the lever 40 to lift periodically-the shaftsection 30, the chuck 36 and the Valve 60 allowing the grinding compound to penetrateanew to the valve seat 59. operate most effectively to produce the proper reciprocating and lifting motion of the valve to produce the best results;

It will be apparent to those skilled in the art that by using additional mechanism such,

for example, as that shown in my copending application,'Serial NOQ 469,606, "filed 'May 1 1, 1921, to control-the movement of the rack 9, the, motion imparted to the valve may .be varied if desiredfrom the equal period reciprocat'ory motion Y which" will result from the use of the mechanism here shown and illustrated.

It win also be apparent to those skilled in theart that a large number of machines,- each including a framel, may be set side by side. In this way valves could be ground simultaneously into a large number 'of internal combustion engine'cylinders, the ma chines being's'o spaced that'each machine would operate simultaneously upon the first valve in the cylinder block. By moving the severalcylinder blocks a short distance,the

' machines could be made to operate simultaously upon the second valve in each cylinder block. The particular construction illus trated in this embodiment of my invention Obviously, this machine will its is particularly adapted for multipleiusein the above described manner by reason of the fact that all of-the mechanism iscarried by y a comparatively narrow-frame. It is'well known that some valves require a great deal of grinding to adapt them to the seat vwith which they are to beassociated, whereas other valves require very little.

I claim:

1.'The combination'with a frame, 1of a work supporting table adjustable .at the front thereof, a sectional shaft'provided with means for supporting each section independently from'the frame, a clutch disengageably connecting two; sections of said shaft, means for maintaining-one of said sections in driving relation with a third sec tion of the shaft, while permitting saidthird section" a' relative axial .movement, and a chuck carriedby said third section.

2. The combination with-a machineframe and a power shaft journaled in the lower rear'portion thereof, of a reciprocatory rack slidably mounted adjacent the top of the frame, means for reciprocating said rack from the power shaft, a horizontal shaft operatively associated with the rack adjacent the upper portion of the frame, three shaft sections in vertical axial alignment at the front of said frame, means for driving one of said sections from said horizontal shaft,

means for disengageably connecting the driven section to a second section, a splined connection between the second section and the third section, whereby said third section is positively driven while. free to move axially with respect to the second section, an adjustable table beneath said third section adapted to support a valve seat member and valve, resilient means for pressing said third section normally toward said adjustable table, means operated from the power shaft for periodically relieving said pressure and a chuck carried by said third section.

3. In a device of the character described, the combination with a power shaft;.of a driven shaft. comprising a section connected with said power shaft for receivingreciprocatory rotary motion therefrom and a second shaft axially spaced from, and alined with, said first section for movement axially relative thereto; a clutch engageable with the first section and having a splined connection with said second section, and a chuck carried by said second section. I

GEO. A. FULLIPS. 

